<template>
	<view>
		<!-- 使用自定义搜索组件 -->
		<my-search :bg-color="'pink'" :radius="20" @click="goSearch"></my-search>
		
		
		
		<view class="scroll-view-container">
			<!-- 左侧滑动区域 -->
			<scroll-view class="left-scroll-view" scroll-y="true" :style="{height:wh + 'px'}">
				<block v-for="(item,index) in cateList" :key="index">
					<view :class="['left-scroll-view-item',index === active ? 'active' : '']" @click="activeChange(index)">
						{{item.cat_name}}
					</view>
				</block>
			</scroll-view>
			
			
			
			<!-- 右侧滑动区域 -->
			<scroll-view scroll-y="true" :style="{height:wh + 'px'}" :scroll-top="scrollTop">
				<view class="cate-lv2" v-for="(item2,index2) in cateLevel2" :key="index2">
					<!-- 二级分类标题 -->
					<view class="cate-lv2-title">/{{item2.cat_name}}/</view>
					<!-- 二级分类下的三级分类列表 -->
					<view class="cate-lv3-list">
						<view class="cate-lv3-item" v-for="(item3,index3) in item2.children" :key="index3" 
						@click="gotoGoodsList(item3)">
							<!-- 三级分类图片 -->
							<image :src="item3.cat_icon" mode=""></image>
							<!-- 三级分类文本 -->
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import badgeMix from '@/mixins/tabbar-badge.js'
	
	export default {
		mixins:['badgeMix'],
		data() {
			return {
				// 当前设备可用高度
				active:0,
				cateList:[],
				wh:0,
				cateLevel2:[],
				scrollTop:0
			};
		},
		onLoad() {
			const sysInfo = uni.getSystemInfoSync()
			this.wh = sysInfo.windowHeight - 50
			this.getCatList()
		},
		methods:{
			goSearch(){
				uni.navigateTo({
					url:'/subpkg/search/search'
				})
			},
			async getCatList(){
				const {data: res} = await uni.$http.get('/api/public/v1/categories')
				// console.log(res.data.data)
				if(res.meta.status !== 200) return uni.$showMsg()
				this.cateList = res.message
				
				// 为2级分类赋值
				this.cateLevel2 = res.message[0].childred
			},
			activeChange(i){
				this.active = i
				
				// 重新为二级分类赋值
				this.cateLevel2 = this.cateList[i].childred
				
				// 解决切换一级分类时 右边滚动条不会重置到顶部的情况
				this.scrollTop = this.scrollTop === 0 ? 1 : 0
			},
			
			// 跳转到商品列表页面
			gotoGoodsList(item){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid' + item.cat_id
				})
			}
		}
	}
</script>

<style lang="scss">
// 我就不写css
// 我他妈就不写css
</style>
